package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.UserHolder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.connection.BitFieldSubCommands;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;
import static com.hmdp.utils.SystemConstants.USER_NICK_NAME_PREFIX;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Slf4j
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
    @Resource
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public Result sendCode(String phone, HttpSession session) {
        //1. 校验手机号
        if (RegexUtils.isPhoneInvalid(phone)) {
            return Result.fail("手机号格式错误");
        }
        //2. 生成验证码
        String code = RandomUtil.randomNumbers(6);
        //3. 保存验证码到session
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY+phone, code,LOGIN_CODE_TTL, TimeUnit.MINUTES);
        //4. 发送验证码
        log.debug("发送验证码成功，验证码：{}", code);
        //5. 返回结果
        return Result.ok(code);
    }

    public Result login(LoginFormDTO loginformdto,HttpSession session){
        //1.校验手机号
        String phone=loginformdto.getPhone();
        if(RegexUtils.isPhoneInvalid(phone)){
            return Result.fail("手机号错误");
        }
        //2.校验验证码
        String CacheCode=stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY+phone);
        String code=loginformdto.getCode();
        if(CacheCode==null || !CacheCode.equals(code)){
            return Result.fail("验证码错误");
        }

        User user = query().eq("phone", phone).one();
        if (user==null){
           user= createUserWithPhone(phone);
        }
        String token = UUID.randomUUID().toString(true);
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO,new HashMap<>(),
                CopyOptions.create()
                        .setIgnoreNullValue( true)
                        .setFieldValueEditor((fieldName,fieldValue)->fieldValue.toString()));
        String tokenKey = LOGIN_USER_KEY + token;

        stringRedisTemplate.opsForHash().putAll(tokenKey, userMap);
        stringRedisTemplate.expire(tokenKey,LOGIN_USER_TTL,TimeUnit.MINUTES);
        return Result.ok(token);
    }

    @Override
    public Result sign() {
        Long id = UserHolder.getUser().getId();
        LocalDateTime now = LocalDateTime.now();

        String key = USER_SIGN_KEY + id  + now.format(DateTimeFormatter.ofPattern(":yyyyMM"));
   int dayOfMonth=now.getDayOfMonth();
   stringRedisTemplate.opsForValue().setBit(key,dayOfMonth-1,true);
   return Result.ok();
    }

    @Override
    public Result signCount() {
        //获取本月截至今天的签到记录
        Long id = UserHolder.getUser().getId();
        LocalDateTime now = LocalDateTime.now();
        String keySuffix= now.format(DateTimeFormatter.ofPattern(":yyyyMM"));
        String key = USER_SIGN_KEY + id + keySuffix;

        int dayOfMonth=now.getDayOfMonth();
        //获取本月所有签到记录
        List<Long> result = stringRedisTemplate.opsForValue().bitField(key, BitFieldSubCommands.create().get(BitFieldSubCommands.BitFieldType.unsigned(dayOfMonth)).valueAt(0));
        if(result==null||result.isEmpty()){
            return Result.ok(0);
        }
        Long num=result.get(0);
        if(num == null||num==0){
return Result.ok(0);
        }
        //遍历循环
        int count=0;
        while (true){
        //判断当前位是否为1
            if((num & 1)==0){
                break;
            }
            else {
                count++;
            }
            num=num>>1;

        }
        return Result.ok(count);

    }



    private User createUserWithPhone(String phone) {
        //创建用户
        User user = new User();
        user.setPhone(phone);
        user.setNickName(USER_NICK_NAME_PREFIX+RandomUtil.randomString(10));
        save(user);
        return user;
    }

}
